Turbine ventilator



FIG. 1 is a front perspective view of a turbine ventilator showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is an elevational view taken from one side thereof the opposite side being the same as the side shown;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof.

The fragmentary broken line representation of roof in FIG. 3 is for purposes of illustration only. 

The ornamental design for a turbine ventilator, as shown and described. 